2 * Copyright (c) 1989, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software developed by the Computer Systems
6 * Engineering group at Lawrence Berkeley Laboratory under DARPA contract
7 * BG 91-66 and contributed to Berkeley.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #if defined(LIBC_SCCS) && !defined(lint)
39 static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
41 #endif /* LIBC_SCCS and not lint */
44 * i386 machine dependent routines for kvm. Hopefully, the forthcoming
45 * vm code will one day obsolete this module.
48 #include <sys/param.h>
49 #include <sys/endian.h>
57 #include <machine/vmparam.h> /* For KERNBASE. */
62 #include "kvm_private.h"
73 * Translate a physical memory address to a file-offset in the crash-dump.
76 _kvm_pa2off(kvm_t *kd, uint64_t pa, off_t *ofs)
78 struct vmstate *vm = kd->vmst;
84 return (I386_PAGE_SIZE - (pa & I386_PAGE_MASK));
89 while (n && (pa < p->p_paddr || pa >= p->p_paddr + p->p_memsz))
93 *ofs = (pa - p->p_paddr) + p->p_offset;
94 return (I386_PAGE_SIZE - (pa & I386_PAGE_MASK));
98 _i386_freevtop(kvm_t *kd)
100 struct vmstate *vm = kd->vmst;
110 _i386_probe(kvm_t *kd)
113 return (_kvm_probe_elf_kernel(kd, ELFCLASS32, EM_386) &&
114 !_kvm_is_minidump(kd));
118 _i386_initvtop(kvm_t *kd)
120 struct kvm_nlist nl[2];
126 kd->vmst = (struct vmstate *)_kvm_malloc(kd, sizeof(struct vmstate));
127 if (kd->vmst == NULL) {
128 _kvm_err(kd, kd->program, "cannot allocate vm");
133 if (kd->rawdump == 0) {
134 if (_kvm_read_core_phdrs(kd, &kd->vmst->phnum,
135 &kd->vmst->phdr) == -1)
139 nl[0].n_name = "kernbase";
142 if (kvm_nlist2(kd, nl) != 0) {
144 kernbase = KERNBASE; /* for old kernels */
146 _kvm_err(kd, kd->program, "cannot resolve kernbase");
150 kernbase = nl[0].n_value;
152 nl[0].n_name = "IdlePDPT";
155 if (kvm_nlist2(kd, nl) == 0) {
156 i386_physaddr_pae_t pa64;
158 if (kvm_read2(kd, (nl[0].n_value - kernbase), &pa,
159 sizeof(pa)) != sizeof(pa)) {
160 _kvm_err(kd, kd->program, "cannot read IdlePDPT");
164 PTD = _kvm_malloc(kd, 4 * I386_PAGE_SIZE);
166 _kvm_err(kd, kd->program, "cannot allocate PTD");
169 for (i = 0; i < 4; i++) {
170 if (kvm_read2(kd, pa + (i * sizeof(pa64)), &pa64,
171 sizeof(pa64)) != sizeof(pa64)) {
172 _kvm_err(kd, kd->program, "Cannot read PDPT");
176 pa64 = le64toh(pa64);
177 if (kvm_read2(kd, pa64 & I386_PG_FRAME_PAE,
178 PTD + (i * I386_PAGE_SIZE), I386_PAGE_SIZE) !=
180 _kvm_err(kd, kd->program, "cannot read PDPT");
188 nl[0].n_name = "IdlePTD";
191 if (kvm_nlist2(kd, nl) != 0) {
192 _kvm_err(kd, kd->program, "bad namelist");
195 if (kvm_read2(kd, (nl[0].n_value - kernbase), &pa,
196 sizeof(pa)) != sizeof(pa)) {
197 _kvm_err(kd, kd->program, "cannot read IdlePTD");
201 PTD = _kvm_malloc(kd, I386_PAGE_SIZE);
203 _kvm_err(kd, kd->program, "cannot allocate PTD");
206 if (kvm_read2(kd, pa, PTD, I386_PAGE_SIZE) != I386_PAGE_SIZE) {
207 _kvm_err(kd, kd->program, "cannot read PTD");
217 _i386_vatop(kvm_t *kd, kvaddr_t va, off_t *pa)
220 i386_physaddr_t offset;
221 i386_physaddr_t pte_pa;
232 PTD = (i386_pde_t *)vm->PTD;
233 offset = va & I386_PAGE_MASK;
236 * If we are initializing (kernel page table descriptor pointer
237 * not yet set) then return pa == va to avoid infinite recursion.
240 s = _kvm_pa2off(kd, va, pa);
242 _kvm_err(kd, kd->program,
243 "_i386_vatop: bootstrap data not in dump");
246 return (I386_PAGE_SIZE - offset);
249 pdeindex = va >> I386_PDRSHIFT;
250 pde = le32toh(PTD[pdeindex]);
251 if ((pde & I386_PG_V) == 0) {
252 _kvm_err(kd, kd->program, "_i386_vatop: pde not valid");
256 if (pde & I386_PG_PS) {
258 * No second-level page table; ptd describes one 4MB
259 * page. (We assume that the kernel wouldn't set
260 * PG_PS without enabling it cr0).
262 offset = va & I386_PAGE_PS_MASK;
263 a = (pde & I386_PG_PS_FRAME) + offset;
264 s = _kvm_pa2off(kd, a, pa);
266 _kvm_err(kd, kd->program,
267 "_i386_vatop: 4MB page address not in dump");
270 return (I386_NBPDR - offset);
273 pteindex = (va >> I386_PAGE_SHIFT) & (I386_NPTEPG - 1);
274 pte_pa = (pde & I386_PG_FRAME) + (pteindex * sizeof(pte));
276 s = _kvm_pa2off(kd, pte_pa, &ofs);
277 if (s < sizeof(pte)) {
278 _kvm_err(kd, kd->program, "_i386_vatop: pte_pa not found");
282 /* XXX This has to be a physical address read, kvm_read is virtual */
283 if (pread(kd->pmfd, &pte, sizeof(pte), ofs) != sizeof(pte)) {
284 _kvm_syserr(kd, kd->program, "_i386_vatop: pread");
288 if ((pte & I386_PG_V) == 0) {
289 _kvm_err(kd, kd->program, "_kvm_kvatop: pte not valid");
293 a = (pte & I386_PG_FRAME) + offset;
294 s = _kvm_pa2off(kd, a, pa);
296 _kvm_err(kd, kd->program, "_i386_vatop: address not in dump");
299 return (I386_PAGE_SIZE - offset);
302 _kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
307 _i386_vatop_pae(kvm_t *kd, kvaddr_t va, off_t *pa)
310 i386_physaddr_pae_t offset;
311 i386_physaddr_pae_t pte_pa;
317 i386_physaddr_pae_t a;
322 PTD = (i386_pde_pae_t *)vm->PTD;
323 offset = va & I386_PAGE_MASK;
326 * If we are initializing (kernel page table descriptor pointer
327 * not yet set) then return pa == va to avoid infinite recursion.
330 s = _kvm_pa2off(kd, va, pa);
332 _kvm_err(kd, kd->program,
333 "_i386_vatop_pae: bootstrap data not in dump");
336 return (I386_PAGE_SIZE - offset);
339 pdeindex = va >> I386_PDRSHIFT_PAE;
340 pde = le64toh(PTD[pdeindex]);
341 if ((pde & I386_PG_V) == 0) {
342 _kvm_err(kd, kd->program, "_kvm_kvatop_pae: pde not valid");
346 if (pde & I386_PG_PS) {
348 * No second-level page table; ptd describes one 2MB
349 * page. (We assume that the kernel wouldn't set
350 * PG_PS without enabling it cr0).
352 offset = va & I386_PAGE_PS_MASK_PAE;
353 a = (pde & I386_PG_PS_FRAME_PAE) + offset;
354 s = _kvm_pa2off(kd, a, pa);
356 _kvm_err(kd, kd->program,
357 "_i386_vatop: 2MB page address not in dump");
360 return (I386_NBPDR_PAE - offset);
363 pteindex = (va >> I386_PAGE_SHIFT) & (I386_NPTEPG_PAE - 1);
364 pte_pa = (pde & I386_PG_FRAME_PAE) + (pteindex * sizeof(pde));
366 s = _kvm_pa2off(kd, pte_pa, &ofs);
367 if (s < sizeof(pte)) {
368 _kvm_err(kd, kd->program, "_i386_vatop_pae: pdpe_pa not found");
372 /* XXX This has to be a physical address read, kvm_read is virtual */
373 if (pread(kd->pmfd, &pte, sizeof(pte), ofs) != sizeof(pte)) {
374 _kvm_syserr(kd, kd->program, "_i386_vatop_pae: read");
378 if ((pte & I386_PG_V) == 0) {
379 _kvm_err(kd, kd->program, "_i386_vatop_pae: pte not valid");
383 a = (pte & I386_PG_FRAME_PAE) + offset;
384 s = _kvm_pa2off(kd, a, pa);
386 _kvm_err(kd, kd->program,
387 "_i386_vatop_pae: address not in dump");
390 return (I386_PAGE_SIZE - offset);
393 _kvm_err(kd, 0, "invalid address (0x%jx)", (uintmax_t)va);
398 _i386_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
402 _kvm_err(kd, 0, "vatop called in live kernel!");
406 return (_i386_vatop_pae(kd, va, pa));
408 return (_i386_vatop(kd, va, pa));
412 _i386_native(kvm_t *kd __unused)
422 static struct kvm_arch kvm_i386 = {
423 .ka_probe = _i386_probe,
424 .ka_initvtop = _i386_initvtop,
425 .ka_freevtop = _i386_freevtop,
426 .ka_kvatop = _i386_kvatop,
427 .ka_native = _i386_native,